#!/usr/bin/python
# -*- coding: utf-8 -*-

# d = {'f':1,'a':2,'c':3,'v':4}
# if 'a' in d:
#     print(d['a'])
# print(d.get('2'))

# s = set([1,2,3])
# print(s)

s = set([1,2,1,1,1,3,"a","a","b"])
print(s)